T40 - Banias to Dothan Upgrade - Details ??

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kstuart · #1 Post by **kstuart** » Sun Sep 09, 2007 4:01 pm

I read a lot of threads here and then found a 1.7ghz Dothan 735 CPU to replaced my 1.3ghz Banias in my T40.

It should not be a problem for me to physically replace the CPU as I've built several PCs in the past and I have the T40 Hardware Manual.

What else is necessary ? Any jumpers or BIOS settings to change for the different CPU speed and parameters ? Do I need to change the voltage anywhere ? Or it will all be taken care of automatically ?

System Details:

BIOS version: 3.20 (1RETDOWW)
BIOS date : 2006-02-27
Embedded controller version: 3.04
Machine type-Model: 237312U

Thanks !

SHoTTa35 · #2 Post by **SHoTTa35** » Sun Sep 09, 2007 4:13 pm

just update your BIOS to the latest one and slap that baby in and you'll be all good to go. And yeah, you'll prolly kick yourself for not doing it sooner! Remember to wear padded shoes!

#3 Post by **Harryc** » Sun Sep 09, 2007 4:14 pm

No jumpers or settings required. It's virtually plug and play. Just make sure to cleanup the old and reapply a good quality thermal paste at the fan/heatsink to CPU interface before reassembly.

kstuart · #4 Post by **kstuart** » Sun Sep 09, 2007 4:17 pm

Harryc wrote:No jumpers or settings required. It's virtually plug and play. Just make sure to cleanup the old and reapply a good quality thermal paste at the fan/heatsink to CPU interface before reassembly.

Thanks for your reply.

But, cleanup the old ___ ? I think you forgot a word ??

PS Any unusual tricks to assembly and dissembly of the T40 that is different from T22 and 600x ?

#5 Post by **Harryc** » Sun Sep 09, 2007 4:24 pm

kstuart wrote: But, cleanup the old ___ ? I think you forgot a word ??

Thermal paste.
No tricks, do a google search on T40 maintenance manual.

awolfe63 · #6 Post by **awolfe63** » Sun Sep 09, 2007 7:30 pm

I've done that exact upgrade.

(anybody want to buy a 1.3GHz Banias BTW?)

Get the service manual (PM me if you can't find it)

Keep the screws separated and use post-its to keep track of which go with which step.

Use good heat-sink paste (Artic Silver is my preference) - but not too much.

BTW - My 1.7GHz Dothan was from a T42 that I upgraded to a 765.

kstuart · #7 Post by **kstuart** » Sun Sep 09, 2007 8:48 pm

I chose the 1.7ghz 735, because it is the sweet spot for speed/dollar.

I paid $27 for a used working pull, and a 1.8ghz runs $60+, and well over $100 for a 2.0ghz.

All the ones that are left over from upgrades - like our 1.3ghz Banias - are easy to find for $10 ...

okkyn · #8 Post by **okkyn** » Mon Sep 10, 2007 9:07 am

Check out my pictures: http://bsnugroho.com/t40upgrade.aspx

Franasia · #9 Post by **Franasia** » Fri Sep 14, 2007 7:53 pm

okkyn wrote:Check out my pictures: http://bsnugroho.com/t40upgrade.aspx

Good job, thanks!

jimzim66 · #10 Post by **jimzim66** » Sun Sep 16, 2007 5:08 pm

How do you put on just the right amount of thermal paste? How do you know you've used too much or too little?

kstuart · #11 Post by **kstuart** » Sun Sep 16, 2007 5:35 pm

jimzim66 wrote:How do you put on just the right amount of thermal paste? How do you know you've used too much or too little?

The paste should come with directions.

doylnea · #12 Post by **doylnea** » Mon Sep 17, 2007 9:54 am

On a desktop chip, and I would presume the same would be the case for a laptop chip, you want to use a 'rice-sized' dab of thermal paste, per Arctic Silver, dabbed in the middle. As you tighten down the heatsink, the dab spreads out evenly.

However, I've seen mention of using the 'bag-method' to spread out thermal paste. I presume that involves using a plastic bag wrapped finger to smear the paste around.

I had fine luck using the heatsink as the spreader. I removed and replaced the thermal paste (that had dried into thick crust about 2-3mm thick everywhere) on a friend's Compaq r3000, that was overheating and shutting down in 5 minutes. Ring&Ring the thermal paste lowered the CPU temp from 73*C! to 42*.

awolfe63 · #13 Post by **awolfe63** » Mon Sep 17, 2007 11:09 am

I also have found the "let the heat sink spread it" method to be the best.

I have had good luck removing the old paste with 91% isopropyl alcohol. I don't know it that is "officially" safe - but it seems to work well for me.

kstuart · #14 Post by **kstuart** » Mon Sep 17, 2007 11:57 am

The directions provided by Arctic Silver themselves are vastly more complicated than this (which is why I was somewhat dubious about the "10 minutes" quoted in the other thread for the whole change

).

From memory (not hard since I did it yestereday), they have you:

- Clean the heatsink with high-percentage isopropyl alcohol
- Put a dab of AS on heatsink and then spread it with finger wrapped in (inside) plastic bag.
- Remove the AS using lint-free cloth
- Put a dab of AS on CPU
- Spread it evenly, but thinly on CPU using edge of old expired credit card

The first 3 steps are to "fill the microscopic pits and valleys in the surface of the heatsink for better thermal conductivity".

jimzim66 · #15 Post by **jimzim66** » Mon Sep 17, 2007 7:44 pm

This is why I asked, cause there seems to be many differing opinions and if I were to attempt an upgrade on my T40 i wouldnt want to under or overdo it.

kstuart · #16 Post by **kstuart** » Mon Sep 17, 2007 9:40 pm

It is the same as installing a CPU on any other PC, so if you want more information and more opinions, do a web search. Or just go to the forums at anandtech.com, a lot of people who are very knowledgeable about building PCs there.

T40 - Banias to Dothan Upgrade - Details ??

T40 - Banias to Dothan Upgrade - Details ??

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